Source : Webster's Revised Unabridged Dictionary (1913)

Stoichiometric \Stoi`chi*o*met"ric\, Stoichiometrical
\Stoi`chi*o*met"ric*al\, a.
   Of or pertaining to stoichiometry; employed in, or obtained
   by, stoichiometry.

Source : WordNet®

stoichiometric
     adj : of or relating to stoichiometry